Re: [Bugme-new] [Bug 9155] New: No fan control with ATI Radeon display support on HP nx6125.

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Monday, 15 October 2007 19:12, Daniel Würfel wrote:
> Am Sonntag, den 14.10.2007, 21:55 +0200 schrieb Rafael J. Wysocki:
> > On Sunday, 14 October 2007 16:18, Daniel Würfel wrote:
> > > Am Sonntag, den 14.10.2007, 16:02 +0200 schrieb Rafael J. Wysocki:
> > > > On Sunday, 14 October 2007 09:26, Daniel Würfel wrote:
> > > > > Hi there,
> > > > > 
> > > > > at first great respect for your fast answers. 
> > > > > I don't think, that the binary ati driver is the problem, because:
> > > > > 1. with switched of "ati radeon display support" in the kernel, the fan
> > > > > control works correctly (and i still using the ati-driver)
> > > > 
> > > > How do you know, however, that the "ati radeon display support" in the kernel
> > > > does not interfere with the ATI driver in a destructive way?
> > > 
> > > I think, but im not sure, that the ati driver is loaded, if X was
> > > started. But at this moment X was not started.
> > 
> > Well, the kernel module part is probably loaded earlier.
> >  
> > > > > 2. the fan starts spinning at the boot screen even if the radeon display
> > > > > driver was loaded (and the ati driver is not just loaded yet).
> > > > 
> > > > I'm not sure what you mean exactly.  Can you clarify, please?dann
> > > 
> > > Well, i see it looks a little bit confused what i wrote. What i mean is,
> > > that the fan at this time starts to rotate, when the "radeon display
> > > support" is loaded at boot time.
> > 
> > I see.
> > 
> > Can you please check:
> > - What happens if you don't use the ATI driver at all (please unload its kernel
> >   module before loading the kernel's radeon one)?
> > - Does the loading of the radeon module trigger the fan automatically?
> > - What happens if the fan module is not loaded at that time?
> 
> I think i got the problem:
> I made some test. The problem is the module radeonfb. If i compile
> radeonfb as a module there is no problem with the fan control. But if i
> compile it into the kernel, than fan control will be destroyed and the
> fan doesn't stop working from the beginning of the system start. 
> The other modules (fglrx, agp_gart) have no influence to the fan
> behaviour.

Thanks for having narrowed this, good job.

Now, the question is why the radeonfb compiled in statically has this effect.

Can you please attach your current .config to the bugzilla entry?
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